MIMO Radar Signal Separation for Low-Memory Side Lobe Reduction

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Solution Overview

Problem

Existing MIMO radar systems require significant memory usage to store decoded signal spectra for side lobe signal component reduction, which is inefficient and costly.

Innovation Solution

A radar device and method that estimates and removes reception signal components corresponding to non-target transmission signals before decoding, reducing the need to store full decode signals, thereby minimizing memory usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the MIMO radar stores decoded signal spectra for each CDM code to estimate and remove side lobe signal components, then the side lobe reduction accuracy is improved, but the memory usage increases significantly

Engineering Contradiction:

Improveside lobe reduction accuracyVSAvoidmemory usage

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent extracts only the necessary reception signal components corresponding to non-target transmission signals from the mixed reception signal, rather than storing and processing complete decoded signal spectra for all codes. This selective extraction reduces memory requirements while maintaining side lobe reduction effectiveness.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent performs preliminary estimation and removal of reception signal components from the mixed reception signal before complete decoding. By removing interfering components early in the processing chain, the system avoids the need to store full decoded spectra for side lobe reduction, thereby reducing memory usage.

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If the radar processes complete decoded signal spectra for each transmission antenna, then the signal processing accuracy is improved, but the processing time and computational load increase

Engineering Contradiction:

Improvesignal processing accuracyVSAvoidprocessing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent extracts only the relevant reception signal components needed for side lobe reduction from the mixed reception signal, avoiding the computational overhead of fully decoding and processing all signal spectra. This selective processing maintains necessary accuracy while reducing computation time.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent performs preliminary processing to estimate and remove reception signal components before complete decoding. This preliminary action eliminates interfering signals early, reducing the computational load for subsequent processing steps while maintaining signal processing accuracy.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20260016564A1Radar device, radar control method, and non-transitory computer-readable medium

Publication Date: 2026.01.15 DENSO CORP

AI summary

A radar device includes: at least one transmission antenna; a transmission signal generation unit configured to generate transmission signals modulated by different codes; a reception antenna configured to receive a mixed reception signal; and a control unit configured to process the mixed reception signal. The control unit acquires the mixed reception signal received by a specific reception antenna, defines decode signals obtained by decoding the acquired mixed reception signal for each code, estimates a reception signal component corresponding to each transmission signal in the mixed reception signal, and removes, from the mixed reception signal, the reception signal component corresponding to a transmission signal other than a target transmission signal.